I've been thinking of making a ported box to replace the sealed one that I have now.
I just got my infinity perfect 10.1s in a box I ordered from a guy on ebay, and I'm thinking that since I have to move my seats up too far with this box, I might as well get a larger ported box and take the seats out completely (never realy use them anyway).
I figgured that a ported box will give about 3db more volume and, if done right, can sound almost as good as a sealed.
I read the articles here, but was wondering about what material I should use for the port its self.
Do I subtract the area that the port takes up, and how do you connect it?
The paper that came with the subs say to make a 1 cubic foot box with a 10.44" long port that's 3" wide (fo=35hz)
If I decide to fiberglass, how would I find the volume? A friend and I were thinking about making the bottom first, then make all the sides a lot bigger than needed, and line the box with a garbage bag and fill it with 1 cu. ft. of water, then you'd cut the sides down to where the water level is.
Anyone know about how much every thing should cost to make a box with the bottom fg and the rest MDF, (not including carpet)?
One last question: Would there be any reason to use one box for both subs since they're in separate chambers anyway?
Replies (6)
ttocs on 03/7/2004 10:46:01
sand is much less damaging to wood then water.... But that is about the only way I know to measure.
I like sealed personally....
alanjlamore on 03/7/2004 10:54:11
Thanks for the tip
The reason I was thinking ported was cause the sealed box sounded like crap...I just found out why.
It wasn't because it's a sealed box, it was because the guy who made it, didn't secure the plastic cups where the wire goes into.
Should I put glue around the hole in the box and put these cups in, or should I use small screws?
Sounded a lot better when I leaned over and held them in.
swez on 03/7/2004 11:10:34
Ahhh you had a nice air leak in that box.... can use screws to attach the cup and some silicone sealer to cover the air leaks. Do this with the subs removed if you have foam surrounds. Silicone can mess up the surrounds as it cures... outgassing issues.
Swez
PS Look for more air leaks...
uochronos on 03/7/2004 13:06:58
i dont see alot of need to use watter to find the volume for 1cubic foot... just make the box 1' x 1' x 1'
alanjlamore on 03/7/2004 16:32:20
The need to use water or sand was for if I was going to form the bottom of the box with fiber glass. The bottom of the dakota is not flat at all.
swez on 03/7/2004 17:59:31
Make a false floor like many other do and have a nice flat surface to work with. Just map out the size you need, trim, cut and install for a test fit. Then carpet before you install same.
If you don't want to drill holes in the flooring, use Liquid Nails. That stuff is very strong.
Swez
PS Use 2 separate, air tight chambers here. If one sub blows, the remaining sub will have its own proper air space... not 2X the air space which will generally blow the 2nd sub in short order.
I just got my infinity perfect 10.1s in a box I ordered from a guy on ebay, and I'm thinking that since I have to move my seats up too far with this box, I might as well get a larger ported box and take the seats out completely (never realy use them anyway).
I figgured that a ported box will give about 3db more volume and, if done right, can sound almost as good as a sealed.
I read the articles here, but was wondering about what material I should use for the port its self.
Do I subtract the area that the port takes up, and how do you connect it?
The paper that came with the subs say to make a 1 cubic foot box with a 10.44" long port that's 3" wide (fo=35hz)
If I decide to fiberglass, how would I find the volume? A friend and I were thinking about making the bottom first, then make all the sides a lot bigger than needed, and line the box with a garbage bag and fill it with 1 cu. ft. of water, then you'd cut the sides down to where the water level is.
Anyone know about how much every thing should cost to make a box with the bottom fg and the rest MDF, (not including carpet)?
One last question: Would there be any reason to use one box for both subs since they're in separate chambers anyway?
Replies (6)
ttocs on 03/7/2004 10:46:01
sand is much less damaging to wood then water.... But that is about the only way I know to measure.
I like sealed personally....
alanjlamore on 03/7/2004 10:54:11
Thanks for the tip
The reason I was thinking ported was cause the sealed box sounded like crap...I just found out why.
It wasn't because it's a sealed box, it was because the guy who made it, didn't secure the plastic cups where the wire goes into.
Should I put glue around the hole in the box and put these cups in, or should I use small screws?
Sounded a lot better when I leaned over and held them in.
swez on 03/7/2004 11:10:34
Ahhh you had a nice air leak in that box.... can use screws to attach the cup and some silicone sealer to cover the air leaks. Do this with the subs removed if you have foam surrounds. Silicone can mess up the surrounds as it cures... outgassing issues.
Swez
PS Look for more air leaks...
uochronos on 03/7/2004 13:06:58
i dont see alot of need to use watter to find the volume for 1cubic foot... just make the box 1' x 1' x 1'
alanjlamore on 03/7/2004 16:32:20
The need to use water or sand was for if I was going to form the bottom of the box with fiber glass. The bottom of the dakota is not flat at all.
swez on 03/7/2004 17:59:31
Make a false floor like many other do and have a nice flat surface to work with. Just map out the size you need, trim, cut and install for a test fit. Then carpet before you install same.
If you don't want to drill holes in the flooring, use Liquid Nails. That stuff is very strong.
Swez
PS Use 2 separate, air tight chambers here. If one sub blows, the remaining sub will have its own proper air space... not 2X the air space which will generally blow the 2nd sub in short order.
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